Daylight Saving Starts dates in the following years:

The dates the holiday is observed are marked with a dotted line (applies to federal holidays). Date calculations are based on your computer's time.

Daylight Saving Starts 2019

Sunday, March 10

Daylight saving time (DST, also known as summer time) is the practice of
advancing clocks by one hour (relative to the Standard Time) during summer
months to make better use of daylight in the evening. The clocks are adjusted
back in the autumn.

For example, if sun rises at 4:00 am and sets at 7:00 pm, by advancing the
clocks we get 5:00 am and 8:00 pm, respectively. Hence we get an extra hour of
daylight in the evening. Assuming most people wake up at 6:00 am or later they
generally do not mind if the time of sunrise becomes 5:00 am instead of 4:00 am.

In the case of the United States the one-hour shift occurs at 2:00 am local
time. In spring the clock advances from the last moment of 01:59 am to 03:00 am
DST. In autumn the clock jumps backward from the last moment of 01:59 am DST to
01:00 am.